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Re: tapped horns vs 1/4 wave length

Posted by tomservo (M) on April 10, 2007 at 19:33:32

In Reply to: Re: tapped horns vs 1/4 wave length posted by Nicolas on April 9, 2007 at 11:34:23:

Hi Bill, Nicolas

The Tapped horn IS sort of a free lunch so far as the bottom portion of a bass horns response is concerned. For a given size box and low corner, you can make more sound per Watt, per excursion limit this way.
Generally, one can get two octaves or more of reasonably flat response, which is normally enough for a woofer. Tapped horns do not generally go as far above the low cutoff as regular horns can but you can combine one with another “upper range” horn.
Below the quarter wave low cutoff, the roll off slope eventually reaches between 18 and 24 dB per octave slope, not as gradual as a sealed box, not as steep as a vented box.

The TH215 while still smaller than a LAB sub, would be a better comparison as it has a lower corner F than the TH-115.
http://www.danleysoundlabs.com/pdf/Danley TH-215 Spec Sheet_r3.pdf
Best,

Tom

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